> From: "Mike Carrell" ...
> A recent cover story in Scientific American presented a > very convincing case for human activity contributing to > global warming, and it has been going on for thousands > of years. > > The case is based on evaluation of the contents of gas > bubbles trapped in ice cores extending back very very > long periods. The CO2 and CH4 content cyclically vary > with a cycle generated by the earth's orbit about the sun > and the earth's precession about its axis. The cycles > produce global warming and cooling. Projecting the cycles > to the present day would indicate that the earth should > have been cooling for the last several thousand years, but > it has not. The trend leveled off with the rise of human > agriculture and production of methane, and clearing > forests, which reduce CO2 capture. The > rate of warming has ramped up acutely with the industrial > age. > > This is one of the most persuasive cases for human > activity inefereing with the global weather cycles that > I have seen. > > Mike Carrell I read portions of the article as well. It brings to mind the ironic possibility that should our civilization be successful in transitioning to new forms of AE we may STILL need to carefully regulate, or possibly even deliberately generate copious amounts of additional CO2 and/or CH4 into the atmosphere least we plunge the planet back into the next ice age. Wouldn't it be ironic if, next to our reclaimed pristine green forests and advanced CF/ZPE powered civilizations, there rise a few conspicuous smokestacks belching pure CO2 back into the atmosphere. Perhaps huge bonfires may become mandatory celebrations - a remembrance of the "good old days". ;-) Regards, Steven Vincent Johnson www.OrionWorks.com
